Affiliation: | 1. 1st Department of Pediatrics, Hippokratio General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece;2. Pulmonology Private Practice, Thessaloniki, Greece;3. Department of Paediatrics, Medical School, Democritus University of Thrace, Alexandroupolis, Greece;4. Department of Paediatric Respiratory and Sleep Medicine, Royal Hospital for Sick Children, Edinburgh, UK;5. 3rd Department of Medicine, Papageorgiou Hospital, Aristotle University of Thessaloniki, Greece |